Improvement in steam-boilers



UNITED STATES PATENT OFFICE.

WILLIAM SCHAUBEL, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN STEAM-BOILE'RS.

Specification forming part of Letters Patent No. 26,788, dated January10, 1860.

To @ZZ whom it may concern:

Be it known that I, WILLIAM SCHAUBEL, of the cit-y and county ofPhiladelphia, and State of Pennsylvania, have invented a new and usefulImprovement in Steam-Boilers; and I do hereby declare the following -tobe a full, clear, and exact description of the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon.

My invention consists of a coiled iue and a chimney arranged within anouter casing in respect to the inner and outer casing of a firechamberand certain tubes connected With the latter in the manner describedhereinafter, so as to form a steam-boiler which presents an extensiveheating-surface in a small compass, and this at less expense as regardsconstruction than the same heating-surface can be obtained by any of theordinary systems of flues and tubes.

In order to enable others skilled in the art to make and use myinvention, I will now proceed to describe its construction andoperation.

On reference to the accompanying drawings, which form a part of thisspecification, Figure I is avertical section of my improvedsteam-boiler; Fig. 2, an end View; Fig. 3, a transverse section 0n theline 1 2, Fig. l, and Fig. 4 a sectional plan on the line 3 4, Fig. 1.

Similarletters referto si milar parts th roughout the several views.

The outer casinfr A of the boiler is of a circular form with adome-shaped top.

B is the outer casing of the fire-chamber, projecting from and forming apart of the outer casing A.

C is the inner casing of the fire-chamber, D the fire-door, and E thegrate.

The tire-chamber communicates with the coiled fine G, which terminatesat and communicates with the chimney H, situated in the center of thebody of the boiler and passing through its dome-shaped top. On theoutside and on each side of the inner casing of the tire-box is a pipeI, each pipe communicating with the {ire-chamber at a point near thefront of the same and at the opposite end With the coiled iue G.

K is a tube situated underneath the boiler and communicating throughorifices with the interior of the same, a cock being attached to the endofv the tube outside this boiler, so that the water in the latter can beblown oif at pleasure.

The coiled iiue having both sides, top, and bottom exposed to the waterin the boiler, presents an extensive heating-surface in a small compass,and this at much less expense as regards construction than the sameheatingsurface can be obtained by any of the ordinary systems of finesand tubes.

The object of the tubes I I is in order that a portion of the productsof combustion may pass upward from the fuel through these tubes into thecoiled flue, thereby tending to maintain the entire fuel in the grate ata uniform heat and preventing the accumulation of partially-consumedfuel at the front corners of the fire-chamber.

I claim as my invention and desire to secure by Letters Patent- Thearrangement of the casing A, with its coiled flue G, chimney H, and theouter casing B and inner casing C, and tubes I I, of the tire-box.

In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

WILLIAM SCI-IAUBEL.

Witnesses:

HENRY HowsoN, Cit-IAS. E. FOSTER.

